Exclusive: Alfonso Cuaron, the Mexican-born helmer who won the Best Director Oscar for Gravity, today left Wme. It looks like he won’t rebound with another agency. He recently signed with Anonymous Content for management, where he has a long relationship with principal and producer Steve Golin, which grew out of Fallen Angels. Cuaron will likely just stay with the management company. It was unclear what prompted the move, but I have confirmed it happened. Cuaron is a…